python3-harvester.py: Fix some debug messages.

The 'file' keyword is not valid for the debug() function, this was
introduced in 93b99a8 and could cause issues in mintupdate when
checking for Cinnamon updates.

Author: mtwebster

python3/cinnamon/harvester.py

@@ -27,11 +27,9 @@
 
 DEBUG = os.getenv("DEBUG") is not None
 
-
 def debug(msg):
     if DEBUG:
-        print(msg)
-
+        print(msg, file=sys.stderr)
 
 LANGUAGE_CODE = "C"
 try:
@@ -257,7 +255,7 @@ def _update_local_json(self):
             debug(f"Downloading from {r.request.url}")
             r.raise_for_status()
         except Exception as e:
-            print(f"Could not refresh json data for {self.spice_type}: {e}")
+            debug(f"Could not refresh json data for {self.spice_type}: {e}")
             return
 
         with open(self.index_file, "w", encoding="utf-8") as f:
@@ -289,7 +287,7 @@ def _download_thumb(self, uuid, item):
                                  params={"time": get_current_timestamp()})
                 r.raise_for_status()
             except Exception as e:
-                print(f"Could not get thumbnail for {uuid}: {e}")
+                debug(f"Could not get thumbnail for {uuid}: {e}")
                 return
 
             with open(paths.thumb_local_path, "wb", encoding="utf-8") as f:
@@ -322,7 +320,7 @@ def _load_metadata(self):
                             self.meta_map[uuid] = metadata
                     except Exception as detail:
                         debug(detail)
-                        print(f"Skipping {uuid}: there was a problem trying to read metadata.json", file=sys.stderr)
+                        debug(f"Skipping {uuid}: there was a problem trying to read metadata.json")
             except FileNotFoundError:
                 # debug("%s does not exist! Creating it now." % directory)
                 try:
@@ -365,7 +363,7 @@ def _generate_update_list(self):
                     update = SpiceUpdate(self.spice_type, uuid, self.index_cache[uuid], self.meta_map[uuid])
                     self.updates.append(update)
             except Exception as e:
-                debug(f"Error checking updates for {uuid}: {e}", file=sys.stderr)
+                debug(f"Error checking updates for {uuid}: {e}")
                 raise
 
         return self.updates
@@ -384,7 +382,7 @@ def _install_by_uuid(self, uuid):
         try:
             item = self.index_cache[uuid]
         except KeyError:
-            print(f"Can't install {uuid} - it doesn't seem to exist on the server", file=sys.stderr)
+            debug(f"Can't install {uuid} - it doesn't seem to exist on the server")
             raise
 
         paths = SpicePathSet(item, spice_type=self.spice_type)
@@ -396,7 +394,7 @@ def _install_by_uuid(self, uuid):
                              params={"time": get_current_timestamp()})
             r.raise_for_status()
         except Exception as e:
-            debug(f"Could not download zip for {uuid}: {e}", file=sys.stderr)
+            debug(f"Could not download zip for {uuid}: {e}")
             raise
 
         try:
@@ -415,7 +413,7 @@ def _install_by_uuid(self, uuid):
 
                 self._load_metadata()
         except Exception as e:
-            debug(f"couldn't install: {e}", file=sys.stderr)
+            debug(f"couldn't install: {e}")
             raise
 
     def _install_from_folder(self, folder, base_folder, uuid, from_spices=False):